I haven't tried Delphiniums myself, but according to "The New Seed-Starters Handbook," it says to keep the planted seeds dark.

Here's an interesting trial someone did, growing some in darkness and some with light - it looks like either would work.

Yeah, I have that and have also read that. I was just surprised that some of the seed packets recommended light and others dark. I wondered if there was any reason I should adopt one method over the other. I guess not. And, thanks, that trial was interesting.